# Celestron StarSense Explorer LT 70AZ Refractor

Source: https://www.ranked10.co.uk/tech/best-telescopes/celestron-starsense-explorer-lt-70az
Ranked #10 in "Best Telescopes 2026: 10 Ranked, and the Specs That Don't Add Up": https://www.ranked10.co.uk/tech/best-telescopes

- Price: £179.99 (checked on Amazon UK on 2026-09-16)
- Amazon rating: 4.3 from 185 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B088PPBC5Z?tag=ranked10-21

At #10 in this guide, the Celestron StarSense Explorer LT 70AZ is a 70 mm refractor on a manual altazimuth mount that uses a docked smartphone to help you find your way around the sky. The listing has it at £179.99 with 4.3 out of 5 from 185 ratings, and the box includes a 25 mm and a 10 mm eyepiece, a 2x Barlow lens, an erect image diagonal, a red dot finderscope and a full-height tripod.

The spec table is where this one gets interesting. It gives the exit pupil as 0.1 mm — the smallest figure anywhere in this guide — but 0.1 mm from a 70 mm lens implies something in the region of 700x magnification, while the two eyepieces supplied work out at about 28x and 70x on the 700 mm focal length. The same table names the model 'Celestron Astromaster LT70' while the title says StarSense Explorer LT 70AZ, and it lists an 812 mm optical tube against a 700 mm focal length. Everything on this page comes from the Amazon listing as it is written; none of it comes from testing by us.

## Specification

| Field | Value |
|---|---|
| Price | £179.99 |
| Rating | 4.3 out of 5 from 185 ratings |
| Aperture / focal length | 70 mm / 700 mm (as listed) |
| Exit pupil | 0.1 mm (as listed) |
| Supplied eyepieces | 25 mm and 10 mm, plus 2x Barlow |
| Optical tube length | 812 mm (as listed) |
| Item dimensions | 87 x 23.5 x 33.7 cm (as listed) |
| Model name on the listing | Celestron Astromaster LT70 (as listed) |

## Questions people ask

**What magnification does the Celestron StarSense Explorer LT 70AZ give?**

The listing pairs a 25 mm and a 10 mm eyepiece with a 700 mm focal length, which works out at roughly 28x and 70x; the included 2x Barlow lens doubles those figures.

**Why does the listing give a 0.1 mm exit pupil?**

The spec table states 0.1 mm, which does not sit with a 70 mm aperture and either supplied eyepiece — a 0.1 mm exit pupil would mean around 700x magnification. It is the smallest exit pupil figure in this guide.

**Does the Celestron StarSense Explorer LT 70AZ need batteries?**

Yes. The listing states that one CR2032 battery is required, which covers the red dot finderscope.

**How does the StarSense app work with this telescope?**

The supplied StarSense dock holds your smartphone, the app recognises star patterns overhead and generates a list of what is currently visible, and the bullseye turns green when your target is ready in the eyepiece. It is listed as compatible with iOS and Android.

**What mount does the Celestron StarSense Explorer LT 70AZ use?**

A manual altazimuth mount with altitude slow motion adjustment via a sliding rod, according to the listing.

**Is the model name consistent across the listing?**

No. The title says StarSense Explorer LT 70AZ while the spec table's model name reads Celestron Astromaster LT70 — two different names inside the same listing.